Now that Jesse James and Kat Von D are engaged Sandra is getting his kids ready for mommy number three.

Sandra Bullock is preparing her cheating ex Jesse James‘ kids for the new mommy entering their lives — tattoo artist and TV personality, Kat Von D. If it comes down to it Sandra, 46, is willing to take a step back and let Chandler, 16, Jesse Jr., 13, and especially little Sunny, 6 — who Sandra cared for since she was a toddler — bond with their soon-to-be stepmom. Is she doing the right thing?

“Sandra loves Sunny with all her heart and will always be in her life,” a friend of the actress tells PopEater.com. “However, she also knows that [Sunny] will have a new mommy soon and will do whatever she needs to do to make sure Jesse’s new wife and Sunny have a great relationship even if that means taking a step away.” Way to go, Sandra! We really respect you for considering the kids above all else.

While Jesse, 41, was married to Sandra he was granted full custody of Sunny after her mother, porn star Janine Lindemulder, was jailed for tax evasion. Sandra played a key role in the custody case, telling the court that she saw Sunny as her own daughter. “Sandra thought Jesse would never be able to hurt her again, but she was wrong,” another insider tells PopEater.com. “When Jesse was in rehab it was Sandy who was a mother to his little girl. Despite what Jesse did, Sandra never walked away from Sunny.”

But now, despite her desire to remain close to the little girl, Sandra has to try and allow Sunny to bond with Kat Von D which means leaving behind their mommy-daughter relationship. “She has given that sweet child nothing but love,” the source adds. “As difficult as this will be, once again Sandra will prove what a lady she is.” We have no doubt!